/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing,
 * software distributed under the License is distributed on an
 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 * KIND, either express or implied.  See the License for the
 * specific language governing permissions and limitations
 * under the License.
 */
package org.apache.iotdb.cluster.query.reader.mult;

import org.apache.iotdb.db.query.reader.universal.Element;
import org.apache.iotdb.db.query.reader.universal.PriorityMergeReader;
import org.apache.iotdb.tsfile.read.reader.IPointReader;

import java.io.IOException;
import java.util.PriorityQueue;

/** Common codes of different priorityMergeReader */
public interface IAssignPathPriorityMergeReader extends IPointReader {
  PriorityQueue<Element> getHeap();

  String getFullPath();

  default void addReader(AbstractMultPointReader reader, long priority) throws IOException {
    if (reader.hasNextTimeValuePair(getFullPath())) {
      getHeap()
          .add(
              new MultElement(
                  getFullPath(),
                  reader,
                  reader.nextTimeValuePair(getFullPath()),
                  new PriorityMergeReader.MergeReaderPriority(priority, 0)));
    } else {
      reader.close();
    }
  }
}
